基于USB2.0的多路异步串行系统设计  

Multiple Serial ports System Based on USB2.0 Technology

作　　者：高世杰[1] 竺晓山[1] 吴志勇[1] 陈涛[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所

出　　处：《电视技术》2005年第7期91-93,共3页Video Engineering

基　　金：吉林省科技厅自然科学基金(20030535);中科院二期创新项目(C04708Z)

摘　　要：比较了几种扩展串口的方案,针对当前串口在工程中广泛应用的特点,提出了一种利用USB2.0接口芯片(CY7C68013)控制异步串行收发器TL16C554的4路串口通信的方案,设计了适于多路串行数据收发的硬件系统,编写了基于多线程技术的软件系统,实现了USB和串口之间进行通信。测试结果表明:单路波特率可稳定在1Mbps,4路串口同时传输,每路波特率可稳定在512Kbps。For the wide usage of serial ports in current engineering projects, comparing several schemes of extending serial ports, the paper puts forward a scheme to accomplish communication between multi-channel serial ports and PC, using USB2.0 interface chip （CY7C68013） to control asynchronous communication element （TL16C554）, gives a hardware design apt to serial channel data receiving and transmitting, and programs a software system with the muhi-thread technology. The testing result shows that single channel serial data speed can be up to 1Mbps stably, and serial data speed in each channel can be up to 512 Kbps stably when transmitting at four serial ports simultaneously.

关 键 词：通用异步收发器 通用串行总线 通用可编程接口 固件 可编程逻辑器件 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构] TP336[自动化与计算机技术—计算机科学与技术]